Bake-furnace.



Patented Oct. 2, |900. W. J. MEIKLEHAM.

BAKE FURNAGE'.

(Application filed Feb.,23, 1900.)

2 Sheets-Sheet l.

(No Model.)

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Patented mit. 2, |900.

w. J. MEIKLEHAM.

BAKE FURNACE.

(Application led Feb. 23, 1900.)

(No Model.)

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WILLIAM J. MEIKLEHAM, OF DENVER, COLORADO.

BAKE-FURNACE.

SPECIFICATION formingpart of Letters Patent No. 659,17 5, dated October 2, 1900. Application filed February 23,1900. Serial No. 6,304. lNo model.)

To all whom t may concern:

Be it known that I, WILLIAM J. MEIKLE- HAM, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented oer-` tain new and useful Improvements in Bake- Furnaces; and I do declare the following to be a fuli, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked lthereon, which form a part of this specification.

My invention relates to improvements in bake-furnaces, my object being to provide a construction adapted to increase the durability and efficiency of furnaces of this class; and to these ends the invention consists of the features, arrangements, and combinations hereinafter described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is avertical longitudinal section taken through the furnace on the line X X, Fig. 3. Fig. 2 is a top or plan view in detail of -the oven, which is composed of sheet-iron. Fig. 3 is a cross-section taken on the line W W, Fig. 1. Fig. 4 is a fragmentary section taken on the line Y Y, Fig. 3. Fig. 5 is a section taken on the line Z Z, Fig. 4, viewed in the direction of the arrow.

Similar reference characters indicating corresponding parts in the views, let the numeral 5 designate -the brick side walls of the structure; 6, the rear wall; 6, the front end wall, and 7 the arch-shaped top. The side walls are reinforced by backstays 8,connected by tie-rods 9, which pass through the Walls and over the top arch of the furnace. Between the top and bottom of the furnace, above the fire-box, is located an arch 10. From the fire-box 10 two distinct flues 13, separated by a partition 14, lead rearwardly 'to the rear end wall 6, where they communicate with vertical flues 15, leading upwardly to the top arch 7. The top wall13a of each flue 13 merges at its rearextremity into a vertical wall 130, located in frontof the rear ues 15.

Vfront corners of the oven.

The sheet-iron oven 16 is located in the top of the structure between the top arch 7 above and the middle arch 10 and the line-walls 13a below. This oven extends from the end wall 6a to the flue-wall 13C in the rear, and it is embraced by the upper part of the side walls 5. The bottoni of the oven is centrally supported by the arch 10 in front and by the fluepartition 14 below, which extends from the bottom of the oven to the bottom wall of the furnace. The oven-bottom is further supported by transverse metal bars 17, whose extremities are let into the side Walls and the top of the partition 14. The rear extremity of the oven is protected by the vertical wall 13. Between the top wall 13a of each flue 13 and the bottom of the oven there is a closed chamber 4. Above the oven and communi- 'eating with the vertical ues 15 at the rear are two fines 18, located between the top arch and the top wall of the oven and separated by an angle-iron partition 19, riveted to the top of the oven and extending forwardly about half the length of the oven, where it forks, as shown at 19C, the two branches 19a of the fork continuing diagonally toward the opposite These branches terminate before they reach the oven-corners, leaving outlets 18a from the fines 18 to the central space 2O between the two branches of the partition. The partition 19 and its branches 19a engage the top arch, whereby the fiues 18 are closed, except at their extremities.

The heat passes from the fire-box 12 through the fines 13 to the rear end of the furnace, thence upwardly through the fines 15 to the top of the furnace, thence forwardly through the fl'ues 18 aboge the oven to the space 20 above the front part of the oven, and thence outof the furnace. through the chimney-flue 21, which is controlled by a damper 2, operated by a rod 23, accessible from the front of the furnace. The top of the oven is supported by bolts 24, passing through the top arch of the furnace-wall.

covered with lire-clay tiling, as shown at 25. The arrangement of the hot-air fines leading from the fire-box, as Vheretofore explained, is such as to concentrate the heat in the space 2O above the oven, whereby the front of the oven is made hottest.

In use the oven is filled with bread, for in- The bottom of the oven is stance, through the front opening 26, controlled by a hinged door 27. Hence the irst bread put in is shoved to the rear extremity of the oven, the last bread put in being in front. As the last bread putl in must be the first removed, it is necessary that the front part of the oven should be the hottest in order to obtain the best possible results from a furnace of this character.

The objectv of the double fines 13, l5, and 1S is to properly distribute the heat to both sides of the oven. It' a single continuous Hue only were employed, one side of the oven would often be made hotter than the other side by reason ot' the tendency of the heat to accun'iulate at one side of the'oven more than on the other side. This phenomenon is observed by persons accustomed to the use of furnaces of this class and while not always explainableisneverthelesstrue. Bythedouble-Hue system this difiiculty is largely overcome, since the heat after leaving the fire-box is compelled to travel 011 opposite sides of the furnace until the space 2O is reached. The chambers L retain the heat and prevent the bottom of the bread from burning in the oven. The fire-box is accessible through an opening 28, controlled by a door 29.

Having thus described my invention, what I claim is l. In a bake-furnace, the combination of a lire-box, an oven extending lengthwise of the furnace and having its front port-ion above the {ire-box, a tine passing beneath the oven and upwardly at the rear end of the oven, a chamber above the roof of the oven, with which the upwardly-extending rear Hue communicates, dividing the said chamber above the oven into three compartments, namely a ue extending lengthwise of the furnace on each side of the partition, and a central compartment located between the fork-arms of the partition and above the front part of the oven, said central compartment being connected with the said [lues at their forward extremities, and an outlet-line communicating with the central compartment.

2. In a bake-furnace, the combination of a lire-box, an oven extending lengthwise of the furnace and having its front portion above the hre-box, a divided fille passing beneath the oven and upwardly at the rear end of the oven, a chamber above the roof of the oven, a partition dividing said chamber into two side flues communicating respectively with the flues leading from the fire-box, the said partition being forked above the front portion of the oven and inclosing` a central space communicating with the forward extremities of the side filles, aud an outlet-flue communicating with the said central compartment.

3. In abake-furnace, the combination with the outer walls of the furnace and a lire-box, of a metal oven extending lengthwise of the furnace and having its front portion above the rebox, a ue passing beneath the oven and upwardly at the rear end of the oven, a chamber above the roof of the oven with which the upwardlyextending rear flue communicates, a forked partition dividing the said chamber above the oven into three compartments, namely the flue extending lengthwise of the furnace on each side of the partition, and a central compartment located between the fork-arms of the partition and above the front part of the oven, the said central compartment communicating with the said flues at their forward extremities, and an outlet-flue communicating with the said central compartment.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM J. MEIKLEHAM. llVitnesses:

GRACE MYTINGER, A. J. OBRIEN. 

